gnu: Add jemalloc.

* gnu/packages/jemalloc.scm: New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu-system.am

@@ -158,6 +158,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/irssi.scm			\
   gnu/packages/iso-codes.scm			\
   gnu/packages/java.scm				\
+  gnu/packages/jemalloc.scm			\
   gnu/packages/jrnl.scm				\
   gnu/packages/julia.scm			\
   gnu/packages/kde.scm				\

gnu/packages/jemalloc.scm

@@ -0,0 +1,43 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Sou Bunnbu <iyzsong@gmail.com>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages jemalloc)
+  #:use-module ((guix licenses) #:select (bsd-2))
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix build-system gnu))
+
+(define-public jemalloc
+  (package
+    (name "jemalloc")
+    (version "3.6.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://www.canonware.com/download/jemalloc/"
+                    name "-" version ".tar.bz2"))
+              (sha256
+               (base32
+                "1zl4vxxjvhg72bdl53sl0idz9wp18c6yzjdmqcnwm09wvmcj2v71"))))
+    (build-system gnu-build-system)
+    (home-page "http://www.canonware.com/jemalloc/")
+    (synopsis "General-purpose scalable concurrent malloc implementation")
+    (description
+     "This library providing a malloc(3) implementation that emphasizes
+fragmentation avoidance and scalable concurrency support.")
+    (license bsd-2)))